Cement paint



106. COMPOSITIONS,

COATING OR PLASTIC.

Patented Apr. 21, 1925.

UNITED STATES PATENT OFFICE.

SPENCER B. NEWBERRY, 0F CLEVELAND, OHIO; ANDREW W. NEWBERRY, EXECUTOR OF THE ESTATE OF SAID SPENCER B. NEWBERRY, DECEASED, AS-SIGNOR, BY DI- RECT AND MESNE ASSIGNMENTS, TO SANDUSKY CEMENT COMPANY, OF CLEVE- LAND, OHIO, A CORPORATION OF OHIO.

CEMENT PAINT.

No Drawing.

To all whom it may concern:

Be it known that I, SPENCER B. NEW- BERRY, a citizen of the United States, and residing at Cleveland, Cuyahoga County, State of Ohio, have invented certain new and useful Improvements in Cement Paint, of which the following is a specification.

It is well known that Portland cement mixed with wat r to the consls ency 0 cream may be used as a aint concrete. metal or wood. but that unless kept molst for some time after applying, the cement coating hardens imperfectly and is easily washed away by rain. I have found that this defect may be overcome by incorporating with the cement certain materials which have the no ertv of holdin inoisture'or absorbm 'l moistur rom 1e air a so 0 e settmg of cement, and that a paint composed of Portland cement with such additions becomes su cienty firm and hard after afew hours to resist injury from rain, and con tinues to harden, forming a permanent enamel-like surface.

A substance which I have found very cf fective in retarding the set of cement is alumin in soluble form, preferably as an 'a 1 met te, for example, odi a e. n y a very small amount of tus 1s required, for example, one tenth to one per cent of the weight of the cement.

The substances which I have found most effective in retaining moisture, thus enabling cement to set and harden without further application of water, are deli uescent or 11 grosco ic salts such as c-aifi c soda mtas: m and the chlondeg 0% aka;

' ll, such as ca mm .010 e ma nesium c -ide. Ammonium chloiygroseopic salt perhaps one er cent to ten per cent of the wei ht of ce- Application filed May 29,

1922. Serial No. 564,594.

the surface by a jet of compressed air.

. soluble aluminum compound I mean the water sofi Ffi rrqiomalumlnum and an alkali metal, as for example, sodium 0' o aluminate: 3Ma,OAl.U or lZ,i5A1.ii, or any of the alums whrclfkff/ are watensoluble sul hates of aluminum and ot-asslum SOCl 1' mm 11 y a ywwesa t mean a salt which absorbs Water from the air, for example,

c%nstic sada, potassium carbonate, or the cji dufi an alkmetal or an earth metal such as ea ci amgch loride or mg; nesium chloride, or a so u le chloride such am chloride which will form calciunTchi'oride in contact with cement.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. A composition of matter for use as a cement paint base containing Portland ce ment an tera. -,1ium sa tie cemet orming more than rcent by weiglit of the compositidnQ- 2. A conrposition of matter for use as a cement paint base containing Portland cement and one-tenth to one per cent of a water-soluble aluminum salt, the proportion of cement by weight being greater than half of the total weight of the mixture.

3. A cement paint base containing Portland cement incorporated with a water-soluble aluminum salt and a hygroscopic salt.

4. A cement paint base consisting of Portland cement incorporated with one-tenth to one per cent of its weight of a water-soluble aluminum salt and one per cent to ten per cent of its weight of a hygroscopic salt.

5. A cement paint base consisting of Port- 100 land cement incorporated with a water-soluble aluminum salt and an alkaline earth metal chloride.

6. A cement paint base consisting of Portland cement incorporated with one-tenth to 105 one per centof its weight of a water-soluble txamm aluminum salt and one per cent to ten per cent of its weight of an alkaline earth metal chloride.

7. A cement paint consisting of Portland cement incorporated with a water-soluble aluminum salt and a hygroscopic salt and mixed with water for use.

8. A cement paint consisting of Portland signature.

SPENCER B. NEWBERRY. 

